X(X+y-r),y(x-y+r),z(x-y-z)
Answers
Answer:
x2 + xy-xr,
y(x-y + r)
= xy-y2 + yr and
z(x-y-z) = xz-yz-z2
Now we add these terms (x2 + xy-xr) + (xy-y2 + yr) + (xz-yz-z2)
= x2-y2-z2 + 2xy-xr + yr + xz-yz
Hence addition of the product of the above expressions is x2-y2-z2 + 2xy-xr + yr + xz-yz.
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